Luminous picture



(No Model.) W. TROTTER, Jr.

LUMINOUS PICTURE, PRINT, 8w. No.'267,284. Patented Nov. 7, 188-2..

"22:10am Jib arch) UNITED STATES PATENT "OFFICE.

WILLIAM TROTTER, JR, 013 OYSTER BAY, NEW YORK.

LUMINOUS'PICTURE, PRINT, 80C.

SPECIFICATION forming part of Letters Patent No. 267,284, dated November7, 1882.

Application filed April 14, 1882, (No model.)

' State of New York, have invented certain new and useful Improvementsin Luminous Pictures, Prints, Inscriptions, and Illustrations,- of whichthe following is a specification, reference being had to theaccompanying drawings. J

This invention relates to painting, printing,- inscribiug delineatin g,or otherwise producin g pictures, letters, figures, or designs onsurfaces of paper, card-board, cloth, glass, wood, metal, or othermaterial in such manner that they will be invisible, or nearly so, whenexposed to incident light, but ,will appear conspicuously in the darkorwhen removed fromas the luminous material which produces the incidentlight.

The invention consists in a sheet or tablet of paper, cloth, card-board,metal, or other material having'upon it. two difl'erent pictures,figures, designs, or letterin'gs and a surrounding ground, one of thesaid pictures, figures, designs, or letterin gs and the ground appearingof the same color when exposed to incident light, but the said figure,picture, design, or lettering being produced in non-luminous ma- -terialand the ground being produced in luminous or phosphorescent material, orvice versa, and the other-of said pictures, figures, designs, orletterings being-of a color different from that of the ground, one ofsaid pictures, figures, designs, or letterings being distinctly orconspicuously visible only when exposedto incident light and the otheronly when re- I moved from incident light.- The two pictures,

designs, figures, or letterings thus produced may be arranged side byside or superposed one over theother.

I withthe two different sorts of painting or printing material. Fig. 31sa view of a card or tablet having upon it two printed letters, one ofwhich is supposed to be visiblepnly when exposed to incident light andthe otheronl-y when removed from incident light.

The card or tablet shown in Figs. 1 and-2 may be produced either bytaking a piece or tablet of ordinary unprepared card-board or paper, ora piece of any other suitable mawill become phosphorescent afterexposure to incident light, or clse'printing, painting, or delineatingthe flgureor design thereon wit 1 asuitable varnish-as mastic ordammar-o. with-'a'solution of gum 'or-gelatine, and dust} ing over theso painted, p'riuted,-or delineated figure with luminous sulphide ofcalcium in powder. the ground a surrounding the figure-must be of asnearly as possible the same color'or tint figure or design; In such acard or tablet the .able from the surrounding grounds; but on removalinto a da'rlrplace after such exposure the figure ordesig i will beluminous and visiinvisible. g The above-described eii'ect maybe variedby or design, as b, non-luminous. Thislnay be done by painting the wholesurface of the card or tablet with luminous paint and afterward figureor design'with an opaque and non-luminous printing-inkor' paint of acolor resembling thatof the ground. In 'case, however, the luminouspaint of the ground (the sulphide of calcium, the printing-ink or paintbut it maybe an oxide of zinc, slightly tinted with ocher or othermaterial to match the tint of the sulphide of calcium. The card, sheet,or tablet so constructed is provided with a second design or figure, asat c, and this design or figure cis of a difl'ei'ent color. In

figure b luminous, the .difl'e'rent-coloredfigure c should-be producedby printing, painting, or steuciling with non luminous paint or ink; butin case the ground a be luminous and the colored figure a should beproduced either of sulphide of calcium or other materialjwhich figure ordesign, as bg-will, under exposure to incident light, be scarcely, ifatall, distinguish-t used for thefigure should not contain lead;

figure or design b non-luminous the'diii'erent- Care must,'however, betaken that v. t, ble, standing; out by itself, the groundbei'ng i makingthe ground a luminous and the figure printing; painting, or stencilingupon it the case the grounda be non-luminous and the with luminous paintor with some thin trans-n 'parent paint through which the phosphorenceof the ground a may shine in the dark.

The card, sheet, or tablet produced with the -two designs'or figures ashereinabove described is proteau in its character,one ofthe figures ordesigns only being plainly visible under exposure to incident light andthe other one only being plainly; visible when the card,

10 tablet, or picture is 'ren oi'ed fromincident.

light.

scribed in that the difi'erent-colore'd figur'e'or '15 design, whetherluminous or non-luminous, is.

superposed or partly superposed over that which corresponds in color.with the ground instead 'of thefigli'res or designsbeing arranged sideby side, but the effect-is the same. W hen the figures are partlysuperposed in this way the different-colored superposed figure cshould'be always printed or painted-with a transparent ink or paint throughwhich either the ground a or figure or design-b, whichever is luminous,may shine through the said figure c;

in the dark.

The example shown: in Fig.3 only differsfrom that shown in Fig. 1 in thesubstitution of two letters for two figures.

- What I claimas my invention, and desire to secure by LQtterSTatent,is-

1. A sheet or tablet ofpaper or other ma l iterial having upon it'twodifferent picturesof The example shown "in Fig.2 only differs fromthatvshown in Fig; 1 and h-erein'above denon-luminous material; and onebeing of a or surface of the tablet andsthe other of a dif-' 2. A sheetor; tablet of paper or other mafigures, designs; or letterin gs ofdifierent colminous materialand the-other in non-luminous material, andhaving the ground or surface surroundi'ngthe s'ajd pictures, figures,designs, or letterings of acolor resembling that of one of thesaid-pictures, figures, designs,or letterp v WM, momma, JR.

Witnesses I rmmr; HAYNES, E1). MORAN'.

ferent color, substantially as herein described;

- ings,.the' said ground or surface and the figure,

idifl'erent' colors,-one produced with phosphor I escent orluminous-ma-terial-,Ithe other with color resembliugthatofthesurroundiugground terial having upon it two different pictures, A

ors, one producedin phosphorescent or 111-

